Turns out I was right.
Quick caveats: I don't think there's any such thing as 'Vitamin B'. But all the B12s and B6s and whatever, I figured if I just looked for 'Vitamin B', they'd all get lumped in. I also know there are more vitamins than these. But this, A to E, seemed like a cute way of going about it.
When you actually look at the whole range from 2004 to today, Vitamins C and D are equal for number of searches. However, it's the trends that matter. Vitamin C has had a slow downward trend over the years, while Vitamin D is indeed shooting for the skies ahead of the competition. And, oddly, Vitamin E had a huge spike in November 2004.
Some random additions: Jamaica leads the pack for searches on both Vitamins A and B, but it's Trinidad and Tobago leading for Vitamins C and E. All-star D finds the Americans on top.
And for fans of cereal boxes, here's another chart for you:
Niacin FTW. The Americans lead the pack in three of these, with India topping the list for pantothenate.
Whatever that is.